body {
    margin: 0px;
    padding: 0px;

}

.section_background {
    width: 100vw;
    height: 100vh;
    background-image: url(../images/background_login.jpg);
    background-size: cover;
}

.section_background_sr {
    width: 500px;
    height: 400px;
    background-color: white;
    position: absolute;
    top: 40%;
    left: 40%;
    transform: translate(-50%, -50%);
    border-radius: 0.625rem;

/ / 内盒子定位 display: flex;
    display: -webkit-flex; /*需要webkit内核*/
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.section_background_sr>#username, .section_background_sr>#password {
    width: 390px;
    height: 48px;
    border-radius: 0.3125rem;
    border: 1px solid #C0C0C0;
    margin-bottom: 15px;
    font-size: 18px;
    padding-left: 10px;
    color: Gray;
    outline-style: none;
}

.section_background_sr>.wj {
    color: #FFA500;
    font-weight: 700;
    margin-left: 330px;
    cursor: pointer;
    /*双击不选中*/
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    margin-bottom: 15px;
}

.section_background_sr>#login_sumbit{
    width: 400px;
    height: 48px;
    border-radius: 0.3125rem;
    background-color: #FFA500;
    border: white 0rem;
    margin-bottom: 15px;
    cursor: pointer;
    font-size: 20px;
    color: white;
    font-weight: 900;
}

.wjmm {
    background-color: rgba(0, 0, 0, .4);
    width: 180px;
    height: 30px;
    display: flex;
    display: -webkit-flex;
    justify-content: center;
    align-items: center;
    color: white;
    border-radius: 50px;
    font-size: 15px;

    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    margin-bottom: 15px;

    position: absolute;
    top: 65%;
    left: 40%;
    transform: translate(-50%, -50%);
    border-radius: 0.625rem;
    text-shadow: 1px 1px 1px rgba(0, 0, 0, .4);
}

.wjmm > a {
    color: #FFA500;
    outline: none;
    text-decoration: none;
}
.error_msg{
	color: red !important;
	margin-bottom: 10px !important;
    width: 100% !important;
    padding-left: 100px !important;
}